Combination-lock



S. HERMANOWICH.

COMBINATION LOCK.

APPLICATION FILED MAR.27| I920.

1 $58,445. Patented Nov. 9, 1920.

2 SHEETS-SHEET 2.

IN VEN TOR.

Stephen Hcrmam. owi. Ch I Q W WQ A TTORNEY.

UNITED STAI ES PATENT OFFICE.

COMBINATION-LOCK.

Application filed March 27, 1920.

I! '0 all to ham it may concern:

Be it known that I, STEPHEN HnRMANowrorr, a citizen of Russia; residing at Ellwood City, county of Lawrence, and State of Pennsylvania, have invented certain new and useful Improvements in Combination- Locks, of which the following is a specification.

This invention relates generally to looks, having more particular reference to locks of the type used on the doors of houses or buildings generally.

The invention has for an object to provide a novel lock of this type having a series of cooperating bolts the operation of certain of which is dependent on the operation of one of the others.

The invention has more specifically for an object to provide an arrangement in which the bolt which is operable by a key from the outside of the door may be operated only when the doorknob or handle has been turned while a similar bolt for use as a night lock may be operated independently of the said handle.

For further comprehension of the inven tion, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings and to the appended claims in which the various novel features of the invention are more particularly set forth.

Figure 1 of the drawings is a face view of a lock constructed according to the invention with the cover plate removed.

Fig. 2 is a transverse section on the line 2- of Fig. 1.

Fig. 3 is a perspective view of the lock.

Fig. 1 is a similar view to Fig. 1 but with the parts in a different position.

Fig. 5 is a detail perspectiveview of the lever whereby one of the bolts may be operated by the usual knob.

Fig. 6 is a detail perspective view of the bolt tumbler.

Fig. 7 is a detail perspective view of one of the bolts.

The casing 10 of my improved lock is of the rectangular shape usual in door locks and is provided with the usual shallow edge wall 10 and closed 011 one side by a removable face plate or cover 11 which is secured in place by screws 12 which enter suitable projections 13 on the inside of the casing. The side of the edge wall 10 through which the bolts project may have the usual perfo- Specification of Letters Patent.

Patented Nov. 9, 1920.

Serial No. 369,192.

rated extensions 14 for securing the lock in the door frame.

As here shown the lock is provided with three bolts comprising an intermediate one 15 adapted for operation by the usual door handle 16, and upper and lower ones 17 and 18 adapted for operation by keys inserted respectively from the inner and outer sides of the door, these bolts being guided in a vertical partition member 19 in the casing. The intermediate bolt is formed on its rear end with a head 20 longitudinally slotted as at 21. and having opposed pairs of lugs 22 and 23 on the face thereof at opposite ends of said slot. The bolt 15 is drawn back, when handle 16 is rotated, by means of a crescent shaped lever 24 fixed midway between its ends on a pintle suitably journaled in the casing and passing through slot 21, this pintle having a square aperture 26 leading therethrough to receive the shank of the handle 16. The convex side of the lever 24 engages the forwardly facing lugs 23 to move the bolt back, the duplex arrangement shown permitting rotation of the handle in either direction. A flat spring 27 bearing between the head 20 and the wall 10 of the casing, normally urges the bolt 15 forward. The rearwardly facing lugs 22 are adapted to engage the ends of the lever 24: to limit the rotary movement thereof, as will be apparent from Fig. 4.

Formed on the underside of the head. 20 is a lug 30 which normally lies in the path of a nose on a tumbler 32 pivoted at its forward end as at 33 to the lower bolt 18, which latter is formed on its underside near its rear end with a curved recess 34: adapted to be operated by a cranked member 34 having a squared end engageable by a key 35 of ordinary construction to throw the bolt. the bottom edge of the tumbler 32 projecting across this recess and thus preventing the key being turned when the lug is in jaxtaposition to the nose 31 on the tumbler, as clearly shown in Fig. 1. A spring 36, which bears on the nose 31 to one side of the lug 30 normally presses the tumbler downward, while longitudinal movement of the bolt 18 may be limited by a fixed projection 37 engaging in an elongated recess 38 on the underside of the bolt.

The upper bolt 17 is in the main of similar construction to the lower bolt 18, having a curved recess 40 in its underside adapted to be engaged by. a cranked member 40 similar to the member 34 and having pivoted thereto as at 41a tumbler 42 whose lower edge projects across the recess 40, a spring 41 similar to the spring 36, bearing against a nose 43 on the tumbler 42 and yieldingly pressing the latter downward. Movement of the bolt 17 is limited similarly to movement of the bolt 18 by a fixed lug 44 which engages in an elongated recess 45 in the underside of the bolt.

T o throw the bolt 18 it is necessary to first rotate the handle 16, causing the lever 24 to bear on one of the forwardly facing lugs 23, moving the bolt 15 backward and causing the lug 80 thereon to move out of the path of the nose 31 on the tumbler 32. The key 35 may then be rotated, lifting the tumbler against the pressure of spring 36 and moving thebolt backward, as shown in- Fig. 4. The bolt 17 which is operable from the inside of the door, and is intended as a night lock may be thrown by simply engaging the key 35 with the cranked member 404 and rotating the latter.

Having thus described my invention what I claim as new and desire to secure by Let- 7 ters Patent of the United States is 2. In a doorlock, a casing, a bolt having its rear end in the form of a widened head.

' said head being longitudinally slotted, op-

positely facing pairs of lugs upon the face of said head at opposite ends of the slot therein, a handle having its shank passing through said slot, a crescent shaped lever fixed on said shank between its ends, and having its convex side facing toward the rear pair of lugs, the forward pair of lugs being adapted to engage the ends of said lever to limit rotation thereof.

' 3. In a door lock, a casing, a bolt having its rear end in the form of a widened head, said head being longitudinally slotted, oppositely facing pairs of lugs upon the face of said head at opposite ends of the slot therein, a handle having its shank passing through said slots, a crescent shaped lever fixed on said shank between its ends, and having its convex side facing toward the rear pair of lugs, the forward pair of lugs being adapted to engage the ends of said lever to limit rotation thereof, a second bolt in said casing, a tumbler pivoted on said second bolt, a nose on said tumbler, and a lug on the said head projecting into the path of movement of said nose when the said bolts are in their forward positions.

In testimony whereof I have affixed my signature.

STEPHEN HERMANOWIGH. 

